APA

Percival J., Turpin F., Exxon, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest), Turpin F. & Exxon.Opportunities for industrial fuel conservation in developing countries. : .

Chicago

Percival J, Turpin F.G, Exxon, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest), Turpin F.G and Exxon.Opportunities for industrial fuel conservation in developing countries. : .

Harvard

Percival J., Turpin F., Exxon, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest), Turpin F. and Exxon.Opportunities for industrial fuel conservation in developing countries. : .

MLA

Percival J, Turpin F.G, Exxon, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest), Turpin F.G and Exxon.: . .